Stereoscopic image display apparatus
A stereoscopic image display apparatus according to an embodiment includes: a display device including a display panel including pixels, and an optical plate controlling light rays emitted from pixels; a camera provided in the display device; a face tracking unit making a decision whether a viewer exists in front of the display device based on an image picked up by the camera, and if the viewer exists, sampling and detecting a distance from the display device to the viewer and a position of the viewer; a memory storing the position of the viewer sampled and detected by the face tracking unit; and an image display control unit estimating the position of the viewer based on the position of the viewer stored in the memory and driving and controlling the display panel on based on the estimated position, when the face tracking unit does not recognize that the viewer exists.
1. A stereoscopic image display apparatus comprising:
a display device comprising:
a display panel comprising a display screen comprising pixels arranged in a matrix form; and
an optical plate configured to control light rays emitted from the pixels on the display panel;
a camera;
a tracking unit configured to determine whether a viewer exists in front of the display device based on an image captured by the camera, and if the viewer exists, to determine a distance from the display device to the viewer and a position of the viewer;
a memory configured to successively store the position of the viewer sampled and detected by the tracking unit, and to generate and store a histogram concerning the position of the viewer sampled and detected by the tracking unit; and
an image display control unit configured to estimate the position of the viewer based on the position of the viewer stored in the memory when the tracking unit does not recognize that the viewer exists, and to estimate a position at which the histogram becomes maximum to be the position of the viewer, and to drive and control the display panel based on the estimated position.
2. The stereoscopic image display apparatus according to claim 1 , wherein the generation of the histogram is conducted in a first time range.
3. The stereoscopic image display apparatus according to claim 1 , wherein the histogram is generated based in part on the assumption that the distance from the display device to the viewer is constant.
4. The stereoscopic image display apparatus according to claim 1 , wherein the tracking unit determines whether the viewer exists in front of the display device based on a face of the viewer.